Preoperative evaluation of femoral and tibial sagittal alignment in robotic-assisted and conventional total knee arthroplasty and consequences for practice

Purpose Robot-assisted total knee arthroplasty (TKA) was developed to improve the precision and accuracy of implant placement in conventional TKA. However, the angular differences between referenced axes in robot-assisted TKA and conventional TKA remain unclear. The aim of this study was to investig...

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Bibliographic Details
Published in:International orthopaedics 2024-08, Vol.48 (8), p.2047-2054
Main Authors: Peng, Yue, Ding, Ran, Li, Ming, Wang, Guangxue, Zhong, Zikang, Wei, Lingbo, Huang, Cheng, Zhang, Nianfei, Hernigou, Philippe, Wang, Weiguo
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee - methods
Female
Femur - diagnostic imaging
Femur - surgery
Humans
Knee Joint - diagnostic imaging
Knee Joint - surgery
Male
Medicine
Medicine & Public Health
Middle Aged
Original Paper
Orthopedics
Osteoarthritis, Knee - surgery
Retrospective Studies
Robotic Surgical Procedures - methods
Tibia - diagnostic imaging
Tibia - surgery
Tomography, X-Ray Computed - methods
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Summary:Purpose Robot-assisted total knee arthroplasty (TKA) was developed to improve the precision and accuracy of implant placement in conventional TKA. However, the angular differences between referenced axes in robot-assisted TKA and conventional TKA remain unclear. The aim of this study was to investigate the angular differences in sagittal alignment between robot-assisted TKA and conventional TKA for both the femur and the tibia and to discuss their clinical implications. Methods We conducted a retrospective analysis of data from 100 patients (97 patients) who underwent computed tomography (CT) for Mako TKA. We measured the angle between the robot femoral axis (RFA) and conventional femoral axis (CFA) in the sagittal plane and the angle between the robot tibial axis (RTA) and the conventional tibial axis (CTA). Angles were compared between the sexes. Correlation analysis was conducted between the angles and height. Results In the sagittal plane, the mean RFA-CFA angle was 2.2° ± 1.6°, and the mean RTA-CTA angle was 2.3° ± 1.6°. There were no significant differences between the two angles among males and females (p > 0.05). There was a correlation between the RFA-CFA angle and RTA-CTA angle ( p  
ISSN:0341-2695
1432-5195
1432-5195
DOI:10.1007/s00264-024-06229-x